ASTR 152 Quiz 6 – Flashcards
Unlock all answers in this set
Unlock answersquestion
The perceived change in the position of an object due to a change in the observer's point of view is called
answer
PARALLAX
question
If a star has a large luminosity and also a low surface temperature then it must have
answer
a small radius
question
Which of the following concerning the sun is its luminosity class?
answer
main sequence
question
Which of the following sequences of spectral classes represents the coolest to hottest stars?
answer
MKGFABO
question
Consider the HR diagram shown. To which group does the star Pollux belong?
answer
giants
question
Considering the HR diagram above, which of the listed stars is the coolest?
answer
Mira
question
Considering the HR diagram above, which of the listed stars is the brightest?
answer
deneb
question
Considering the HR diagram above, which of the listed stars is the smallest?
answer
bernards star
question
Using the HR diagram, determine which has more mass, the Sun or Barnard's Star?
answer
sun
question
If a star has a parallax of 0.25 arc seconds, what is the distance to that star?
answer
4 parsecs
question
Alan lives on a planet that is two times closer to a star than Zorg. Alan sees the star as being __________ than Zorg does.
answer
4x brighter
question
A binary star system that is detected from Doppler shifted spectra is called ___________.
answer
spectroscopic
